40043312000 has 128 divisors (see below), whose sum is σ = 99691862400. Its totient is φ = 15995750400.

The previous prime is 40043311933. The next prime is 40043312011. The reversal of 40043312000 is 21334004.

It is a tau number, because it is divible by the number of its divisors (128).

It is a self number, because there is not a number n which added to its sum of digits gives 40043312000.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17646866 + ... + 17649134.

It is an arithmetic number, because the mean of its divisors is an integer number (778842675).

Almost surely, 2^40043312000 is an apocalyptic number.

40043312000 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40043312000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49845931200).

40043312000 is an abundant number, since it is smaller than the sum of its proper divisors (59648550400).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40043312000 is a wasteful number, since it uses less digits than its factorization.

40043312000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3401 (or 3379 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 17.

Adding to 40043312000 its reverse (21334004), we get a palindrome (40064646004).

The spelling of 40043312000 in words is "forty billion, forty-three million, three hundred twelve thousand".